How to distinguish between door and window seals

[China Glass Network] As the prices of various petrochemical products continue to rise, some irresponsible manufacturers have begun unfair competition from raw materials (so-called cut corners, shoddy). I would like to talk about personal opinions about some of the current authors about building door and window sealing.

The key to the door and window is the sealing, and the sealing of the sealing strip plays a decisive role. The sealing material used in the market is generally modified by PVC. The key function in soft PVC is nothing more than the addition of plasticizer inside. The relatively stable plasticizer is dioctyl phthalate. Fat, dibutyl fat. However, the current market price is very high, and some unscrupulous traders use some other cheap things instead of (waste oil, the remaining oil base of the refinery, etc.) to bring a lot of hidden dangers to consumers.

Its product symptoms:

1. Appearance of surface oil leaching occurs. Those waste oils are not compatible with PVC at all. The surface of the sealing strip is prone to oil and grease, and the surface of the profile is also stained with yellow. Not even environmentally friendly, there are many volatile substances that pollute the air.

2. When the so-called plasticizer volatilizes or oozes out, the sealing strip loses its original softness, becomes very hard, and quickly ages and shrinks, so that a part of the closed door and window has a large gap, and the airtightness changes. Very poor (water leakage, dust leakage), especially the steel lining inside the plastic steel doors and windows will be quickly corroded. Many users often find that many red liquids are dirty from the beading part inside the window during the rainy season, that is, the doors and windows are leaking steel lining. When it is corroded early, the life of doors and windows will be greatly reduced.

In the production process, the proportion of seals invested is small, but its role can not be ignored. So I don’t think you should use fake and fake products to reduce the cost of the last one. The identification method is very simple.

First, use the nose to smell if there is any smell, the normal PVC material will have a little bit of son's mellow taste, almost very little to smell.

Second, wrap the sealing strip as tightly as possible on the profile and leave it at high temperature for a period of time (on the roof or in a sunny place). Check whether the contact surface between the surface of the profile and the sealing strip is stained and discolored. Whether the dust on the surface of the sealing strip is yellow (the oil is easy to absorb the soil) is oily, and it is dirty.

Third, some of the cheaper seal fillers will be a lot, so the surface will not be very bright, those are very cheap and the appearance is very bright and not desirable.

Fourth, look at the proportion, how many meters per kilogram. There are a lot of illegal traders who use big fillers. We generally use a relatively small proportion of fillers to reduce the cost (light calcium carbonate). The weight of rice will not change much, but some manufacturers are pursuing bigger The output, (saving a little electricity) using talcum powder, heavy calcium and other things as a filler, greatly increasing the proportion of sealing strip products, (our users are generally bought in kilograms, used by length) so invisible Instead, it increases the cost without dying. Add a heavy calcium seal and stretch it back and forth several times with a small amount of white powder on the surface.